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There are four light-weight-rod samples A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted: (i) A is feebly repelled (ii) B is feebly attracted (iii) C is strongly attracted (iv) D remains unaffected Which one of the following is true?

1. B is of a paramagnetic material
2. C is of a diamagnetic material
3. C is of a ferromagnetic material
4. D is of a non-magnetic material

Correct answer: C is of a ferromagnetic material

Solution

C is strongly attracted to the magnet, which is a characteristic property of ferromagnetic materials. Ferromagnetic materials exhibit strong attraction to magnetic fields.

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